Problem with getting linked javascript to run

http://www.talkingboxmedia.com/dryarnell.com/

Working on the above site, i have confirmed that my simple javascript rollover function works by pasting the code directly in the header.php file, and tested it online. However, in linking to the file via

<script type=”text/javascript”
src=”<?php bloginfo(“template_url”); ?>/js/imageswap.js”>
</script>

I confirm with firebug that the code is being linked/called, but the javascript does not run the rollover. I’m sure i’m missing/forgetting something simple, as it’s been a year since i’ve put one of these together….

please HELP!!…and thanks